When facts are inconvenient, when international law, human rights and history get in the way, when war crimes can't easily be justified or explained away, when logic doesn't help much, the current crop of American political leaders turns to what is now the old reliable: 9/11. We have to fight in Afghanistan because ... somehow ... it's tied into what happened on September 11, 2001. Here's Vice-President Joe Biden: "We know that it was from the space that joins Afghanistan and Pakistan that the attacks of 9/11 occurred."